./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/fkp2014.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-lit/fkp2014.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f24d9db33c7d5aecb89ac12017849974773f5d17a3292112bf25190c4dfae9f0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:45:12,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:45:12,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:45:12,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:45:12,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:45:12,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:45:12,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:45:12,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:45:12,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:45:12,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:45:12,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:45:12,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:45:12,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:45:12,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:45:12,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:45:12,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:45:12,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:45:12,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:45:12,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:45:12,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:45:12,353 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:45:12,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:45:12,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:45:12,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:45:12,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:45:12,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:45:12,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:45:12,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:45:12,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:45:12,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:45:12,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:45:12,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:45:12,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:45:12,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:45:12,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:45:12,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:45:12,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:45:12,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:45:12,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:45:12,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:45:12,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:45:12,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:45:12,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:45:12,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:45:12,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:45:12,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:45:12,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:45:12,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:45:12,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:45:12,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:45:12,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:45:12,408 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:45:12,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:45:12,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:45:12,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:45:12,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:12,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:45:12,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:45:12,412 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:45:12,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:45:12,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:45:12,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24d9db33c7d5aecb89ac12017849974773f5d17a3292112bf25190c4dfae9f0 [2022-07-21 08:45:12,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:45:12,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:45:12,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:45:12,692 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:45:12,693 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:45:12,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/fkp2014.i [2022-07-21 08:45:12,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae8cfbd/12a4896c288b4aaf8572203d5799cbbc/FLAG06abaeabe [2022-07-21 08:45:13,131 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:45:13,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2014.i [2022-07-21 08:45:13,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae8cfbd/12a4896c288b4aaf8572203d5799cbbc/FLAG06abaeabe [2022-07-21 08:45:13,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae8cfbd/12a4896c288b4aaf8572203d5799cbbc [2022-07-21 08:45:13,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:45:13,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:45:13,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:13,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:45:13,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:45:13,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb4cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13, skipping insertion in model container [2022-07-21 08:45:13,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:45:13,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:45:13,466 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2014.i[30003,30016] [2022-07-21 08:45:13,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:13,483 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:45:13,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2014.i[30003,30016] [2022-07-21 08:45:13,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:13,546 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:45:13,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13 WrapperNode [2022-07-21 08:45:13,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:13,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:13,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:45:13,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:45:13,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,593 INFO L137 Inliner]: procedures = 173, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 64 [2022-07-21 08:45:13,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:13,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:45:13,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:45:13,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:45:13,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:45:13,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:45:13,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:45:13,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:45:13,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:45:13,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:45:13,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:45:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:45:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-21 08:45:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 08:45:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:45:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:45:13,674 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:45:13,777 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:45:13,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:45:13,924 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:45:13,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:45:13,944 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 08:45:13,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:13 BoogieIcfgContainer [2022-07-21 08:45:13,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:45:13,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:45:13,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:45:13,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:45:13,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:45:13" (1/3) ... [2022-07-21 08:45:13,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7361a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:13, skipping insertion in model container [2022-07-21 08:45:13,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (2/3) ... [2022-07-21 08:45:13,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7361a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:13, skipping insertion in model container [2022-07-21 08:45:13,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:13" (3/3) ... [2022-07-21 08:45:13,952 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2014.i [2022-07-21 08:45:13,956 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:45:13,962 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:45:13,962 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:45:13,962 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:45:14,012 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:14,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 145 flow [2022-07-21 08:45:14,084 INFO L129 PetriNetUnfolder]: 4/82 cut-off events. [2022-07-21 08:45:14,084 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:14,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 4/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-07-21 08:45:14,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 145 flow [2022-07-21 08:45:14,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 70 transitions, 145 flow [2022-07-21 08:45:14,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:14,106 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319cc25c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f7d022a [2022-07-21 08:45:14,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:45:14,128 INFO L129 PetriNetUnfolder]: 3/68 cut-off events. [2022-07-21 08:45:14,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:14,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,129 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:14,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:45:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1443592451, now seen corresponding path program 1 times [2022-07-21 08:45:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192169077] [2022-07-21 08:45:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:14,266 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:14,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:14,307 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:14,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:45:14,309 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:45:14,310 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:45:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:45:14,310 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:45:14,312 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:14,312 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:45:14,323 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:14,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 196 flow [2022-07-21 08:45:14,339 INFO L129 PetriNetUnfolder]: 6/121 cut-off events. [2022-07-21 08:45:14,339 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:45:14,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 6/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 183 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2022-07-21 08:45:14,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 92 transitions, 196 flow [2022-07-21 08:45:14,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 196 flow [2022-07-21 08:45:14,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:14,343 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319cc25c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f7d022a [2022-07-21 08:45:14,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:45:14,350 INFO L129 PetriNetUnfolder]: 3/70 cut-off events. [2022-07-21 08:45:14,351 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:45:14,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,351 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:14,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:45:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1750266967, now seen corresponding path program 1 times [2022-07-21 08:45:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110983553] [2022-07-21 08:45:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110983553] [2022-07-21 08:45:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110983553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:14,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:14,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233257991] [2022-07-21 08:45:14,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:14,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 92 [2022-07-21 08:45:14,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:14,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 92 [2022-07-21 08:45:14,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:14,727 INFO L129 PetriNetUnfolder]: 23/219 cut-off events. [2022-07-21 08:45:14,727 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-21 08:45:14,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 219 events. 23/219 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 799 event pairs, 0 based on Foata normal form. 50/259 useless extension candidates. Maximal degree in co-relation 190. Up to 14 conditions per place. [2022-07-21 08:45:14,730 INFO L132 encePairwiseOnDemand]: 78/92 looper letters, 28 selfloop transitions, 12 changer transitions 1/111 dead transitions. [2022-07-21 08:45:14,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 334 flow [2022-07-21 08:45:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 766 transitions. [2022-07-21 08:45:14,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8326086956521739 [2022-07-21 08:45:14,746 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 766 transitions. [2022-07-21 08:45:14,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 766 transitions. [2022-07-21 08:45:14,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:14,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 766 transitions. [2022-07-21 08:45:14,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.6) internal successors, (766), 10 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,764 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,766 INFO L186 Difference]: Start difference. First operand has 93 places, 92 transitions, 196 flow. Second operand 10 states and 766 transitions. [2022-07-21 08:45:14,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 334 flow [2022-07-21 08:45:14,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 332 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:14,774 INFO L242 Difference]: Finished difference. Result has 105 places, 95 transitions, 258 flow [2022-07-21 08:45:14,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=258, PETRI_PLACES=105, PETRI_TRANSITIONS=95} [2022-07-21 08:45:14,781 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2022-07-21 08:45:14,782 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 95 transitions, 258 flow [2022-07-21 08:45:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,782 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,783 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:14,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:45:14,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:45:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1293266799, now seen corresponding path program 1 times [2022-07-21 08:45:14,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816406113] [2022-07-21 08:45:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:14,820 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:14,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:14,858 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:14,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:45:14,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:45:14,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:45:14,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:45:14,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:45:14,862 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:45:14,863 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:14,863 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:45:14,884 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:14,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 114 transitions, 249 flow [2022-07-21 08:45:14,905 INFO L129 PetriNetUnfolder]: 8/160 cut-off events. [2022-07-21 08:45:14,905 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:45:14,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 160 events. 8/160 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 304 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2022-07-21 08:45:14,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 114 transitions, 249 flow [2022-07-21 08:45:14,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 114 transitions, 249 flow [2022-07-21 08:45:14,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:14,911 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319cc25c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f7d022a [2022-07-21 08:45:14,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:45:14,916 INFO L129 PetriNetUnfolder]: 3/71 cut-off events. [2022-07-21 08:45:14,916 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:45:14,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,916 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:14,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:45:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1279246079, now seen corresponding path program 1 times [2022-07-21 08:45:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884758341] [2022-07-21 08:45:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884758341] [2022-07-21 08:45:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884758341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:15,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:15,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:15,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239984125] [2022-07-21 08:45:15,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:15,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:15,018 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 114 [2022-07-21 08:45:15,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:15,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 114 [2022-07-21 08:45:15,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:15,291 INFO L129 PetriNetUnfolder]: 238/950 cut-off events. [2022-07-21 08:45:15,291 INFO L130 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2022-07-21 08:45:15,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 950 events. 238/950 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6514 event pairs, 11 based on Foata normal form. 277/1187 useless extension candidates. Maximal degree in co-relation 1038. Up to 98 conditions per place. [2022-07-21 08:45:15,298 INFO L132 encePairwiseOnDemand]: 97/114 looper letters, 63 selfloop transitions, 16 changer transitions 1/166 dead transitions. [2022-07-21 08:45:15,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 166 transitions, 580 flow [2022-07-21 08:45:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-07-21 08:45:15,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8552631578947368 [2022-07-21 08:45:15,301 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-07-21 08:45:15,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-07-21 08:45:15,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:15,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-07-21 08:45:15,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,307 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,307 INFO L186 Difference]: Start difference. First operand has 116 places, 114 transitions, 249 flow. Second operand 10 states and 975 transitions. [2022-07-21 08:45:15,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 166 transitions, 580 flow [2022-07-21 08:45:15,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 560 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:15,310 INFO L242 Difference]: Finished difference. Result has 128 places, 119 transitions, 341 flow [2022-07-21 08:45:15,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=341, PETRI_PLACES=128, PETRI_TRANSITIONS=119} [2022-07-21 08:45:15,311 INFO L279 CegarLoopForPetriNet]: 116 programPoint places, 12 predicate places. [2022-07-21 08:45:15,311 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 119 transitions, 341 flow [2022-07-21 08:45:15,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:15,312 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:45:15,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:45:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 406920230, now seen corresponding path program 1 times [2022-07-21 08:45:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:15,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482955814] [2022-07-21 08:45:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:15,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482955814] [2022-07-21 08:45:15,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482955814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:15,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:15,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987714901] [2022-07-21 08:45:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:15,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:15,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:15,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 114 [2022-07-21 08:45:15,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 119 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:15,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 114 [2022-07-21 08:45:15,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:15,600 INFO L129 PetriNetUnfolder]: 269/1370 cut-off events. [2022-07-21 08:45:15,601 INFO L130 PetriNetUnfolder]: For 746/785 co-relation queries the response was YES. [2022-07-21 08:45:15,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 1370 events. 269/1370 cut-off events. For 746/785 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10818 event pairs, 40 based on Foata normal form. 21/1332 useless extension candidates. Maximal degree in co-relation 1988. Up to 131 conditions per place. [2022-07-21 08:45:15,610 INFO L132 encePairwiseOnDemand]: 102/114 looper letters, 61 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2022-07-21 08:45:15,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 766 flow [2022-07-21 08:45:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 949 transitions. [2022-07-21 08:45:15,612 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8324561403508772 [2022-07-21 08:45:15,612 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 949 transitions. [2022-07-21 08:45:15,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 949 transitions. [2022-07-21 08:45:15,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:15,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 949 transitions. [2022-07-21 08:45:15,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.9) internal successors, (949), 10 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,616 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,617 INFO L186 Difference]: Start difference. First operand has 128 places, 119 transitions, 341 flow. Second operand 10 states and 949 transitions. [2022-07-21 08:45:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 766 flow [2022-07-21 08:45:15,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:15,622 INFO L242 Difference]: Finished difference. Result has 139 places, 131 transitions, 481 flow [2022-07-21 08:45:15,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=481, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-07-21 08:45:15,623 INFO L279 CegarLoopForPetriNet]: 116 programPoint places, 23 predicate places. [2022-07-21 08:45:15,623 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 481 flow [2022-07-21 08:45:15,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,623 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:15,623 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:15,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:45:15,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:45:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1816871974, now seen corresponding path program 1 times [2022-07-21 08:45:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:15,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528052179] [2022-07-21 08:45:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:15,636 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:15,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:15,648 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:15,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:45:15,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:45:15,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:45:15,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:45:15,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:45:15,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:45:15,649 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:45:15,649 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:15,649 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:45:15,662 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:15,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 139 places, 136 transitions, 304 flow [2022-07-21 08:45:15,678 INFO L129 PetriNetUnfolder]: 10/199 cut-off events. [2022-07-21 08:45:15,679 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:45:15,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 199 events. 10/199 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2022-07-21 08:45:15,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 136 transitions, 304 flow [2022-07-21 08:45:15,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 136 transitions, 304 flow [2022-07-21 08:45:15,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:15,682 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319cc25c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f7d022a [2022-07-21 08:45:15,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:45:15,685 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-21 08:45:15,685 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:45:15,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:15,685 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:15,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2006582730, now seen corresponding path program 1 times [2022-07-21 08:45:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543458177] [2022-07-21 08:45:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:15,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543458177] [2022-07-21 08:45:15,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543458177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:15,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:15,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931866555] [2022-07-21 08:45:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:15,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:15,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:15,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:15,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:15,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:16,331 INFO L129 PetriNetUnfolder]: 1677/4738 cut-off events. [2022-07-21 08:45:16,331 INFO L130 PetriNetUnfolder]: For 1790/1790 co-relation queries the response was YES. [2022-07-21 08:45:16,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8234 conditions, 4738 events. 1677/4738 cut-off events. For 1790/1790 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 42652 event pairs, 135 based on Foata normal form. 1430/5996 useless extension candidates. Maximal degree in co-relation 4815. Up to 757 conditions per place. [2022-07-21 08:45:16,374 INFO L132 encePairwiseOnDemand]: 116/136 looper letters, 89 selfloop transitions, 20 changer transitions 1/212 dead transitions. [2022-07-21 08:45:16,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 806 flow [2022-07-21 08:45:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1172 transitions. [2022-07-21 08:45:16,376 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.861764705882353 [2022-07-21 08:45:16,376 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1172 transitions. [2022-07-21 08:45:16,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1172 transitions. [2022-07-21 08:45:16,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:16,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1172 transitions. [2022-07-21 08:45:16,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.2) internal successors, (1172), 10 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,384 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,384 INFO L186 Difference]: Start difference. First operand has 139 places, 136 transitions, 304 flow. Second operand 10 states and 1172 transitions. [2022-07-21 08:45:16,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 806 flow [2022-07-21 08:45:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 752 flow, removed 27 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:16,388 INFO L242 Difference]: Finished difference. Result has 150 places, 143 transitions, 417 flow [2022-07-21 08:45:16,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=417, PETRI_PLACES=150, PETRI_TRANSITIONS=143} [2022-07-21 08:45:16,389 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 11 predicate places. [2022-07-21 08:45:16,389 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 143 transitions, 417 flow [2022-07-21 08:45:16,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:16,391 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:16,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:45:16,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash -264445945, now seen corresponding path program 1 times [2022-07-21 08:45:16,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:16,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265832313] [2022-07-21 08:45:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:16,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265832313] [2022-07-21 08:45:16,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265832313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:16,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226927952] [2022-07-21 08:45:16,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:16,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:16,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:16,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:16,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:16,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:17,398 INFO L129 PetriNetUnfolder]: 2224/7252 cut-off events. [2022-07-21 08:45:17,398 INFO L130 PetriNetUnfolder]: For 4963/5150 co-relation queries the response was YES. [2022-07-21 08:45:17,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15296 conditions, 7252 events. 2224/7252 cut-off events. For 4963/5150 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 76428 event pairs, 341 based on Foata normal form. 136/7122 useless extension candidates. Maximal degree in co-relation 15173. Up to 1084 conditions per place. [2022-07-21 08:45:17,480 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 87 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2022-07-21 08:45:17,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 1057 flow [2022-07-21 08:45:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1139 transitions. [2022-07-21 08:45:17,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-07-21 08:45:17,484 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1139 transitions. [2022-07-21 08:45:17,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1139 transitions. [2022-07-21 08:45:17,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:17,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1139 transitions. [2022-07-21 08:45:17,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.9) internal successors, (1139), 10 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,489 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,489 INFO L186 Difference]: Start difference. First operand has 150 places, 143 transitions, 417 flow. Second operand 10 states and 1139 transitions. [2022-07-21 08:45:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 1057 flow [2022-07-21 08:45:17,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 1055 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:17,528 INFO L242 Difference]: Finished difference. Result has 161 places, 161 transitions, 624 flow [2022-07-21 08:45:17,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=624, PETRI_PLACES=161, PETRI_TRANSITIONS=161} [2022-07-21 08:45:17,529 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 22 predicate places. [2022-07-21 08:45:17,529 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 161 transitions, 624 flow [2022-07-21 08:45:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:17,530 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:17,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:45:17,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1096817245, now seen corresponding path program 1 times [2022-07-21 08:45:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675988674] [2022-07-21 08:45:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:45:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675988674] [2022-07-21 08:45:17,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675988674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:17,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:17,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997301727] [2022-07-21 08:45:17,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:17,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:17,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:17,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 161 transitions, 624 flow. Second operand has 7 states, 7 states have (on average 104.57142857142857) internal successors, (732), 7 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:17,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:17,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:18,684 INFO L129 PetriNetUnfolder]: 2824/9311 cut-off events. [2022-07-21 08:45:18,684 INFO L130 PetriNetUnfolder]: For 9644/9811 co-relation queries the response was YES. [2022-07-21 08:45:18,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 9311 events. 2824/9311 cut-off events. For 9644/9811 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 105693 event pairs, 503 based on Foata normal form. 112/9140 useless extension candidates. Maximal degree in co-relation 21235. Up to 1500 conditions per place. [2022-07-21 08:45:18,795 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 82 selfloop transitions, 64 changer transitions 0/254 dead transitions. [2022-07-21 08:45:18,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 254 transitions, 1485 flow [2022-07-21 08:45:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1134 transitions. [2022-07-21 08:45:18,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8338235294117647 [2022-07-21 08:45:18,798 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1134 transitions. [2022-07-21 08:45:18,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1134 transitions. [2022-07-21 08:45:18,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:18,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1134 transitions. [2022-07-21 08:45:18,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.4) internal successors, (1134), 10 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:18,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:18,803 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:18,803 INFO L186 Difference]: Start difference. First operand has 161 places, 161 transitions, 624 flow. Second operand 10 states and 1134 transitions. [2022-07-21 08:45:18,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 254 transitions, 1485 flow [2022-07-21 08:45:18,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 254 transitions, 1478 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:45:18,891 INFO L242 Difference]: Finished difference. Result has 172 places, 195 transitions, 1126 flow [2022-07-21 08:45:18,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1126, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2022-07-21 08:45:18,892 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2022-07-21 08:45:18,892 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 1126 flow [2022-07-21 08:45:18,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.57142857142857) internal successors, (732), 7 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:18,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:18,893 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:18,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:45:18,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash -367514462, now seen corresponding path program 1 times [2022-07-21 08:45:18,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:18,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740357078] [2022-07-21 08:45:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740357078] [2022-07-21 08:45:18,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740357078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:18,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:18,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676338569] [2022-07-21 08:45:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:18,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:18,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 1126 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:18,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:18,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:18,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:20,615 INFO L129 PetriNetUnfolder]: 3430/12390 cut-off events. [2022-07-21 08:45:20,615 INFO L130 PetriNetUnfolder]: For 15827/16396 co-relation queries the response was YES. [2022-07-21 08:45:20,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28941 conditions, 12390 events. 3430/12390 cut-off events. For 15827/16396 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 151464 event pairs, 439 based on Foata normal form. 329/12435 useless extension candidates. Maximal degree in co-relation 28801. Up to 1792 conditions per place. [2022-07-21 08:45:20,834 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 126 selfloop transitions, 94 changer transitions 0/328 dead transitions. [2022-07-21 08:45:20,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 328 transitions, 2261 flow [2022-07-21 08:45:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:45:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 08:45:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1822 transitions. [2022-07-21 08:45:20,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373161764705882 [2022-07-21 08:45:20,838 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1822 transitions. [2022-07-21 08:45:20,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1822 transitions. [2022-07-21 08:45:20,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:20,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1822 transitions. [2022-07-21 08:45:20,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.875) internal successors, (1822), 16 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,845 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,846 INFO L186 Difference]: Start difference. First operand has 172 places, 195 transitions, 1126 flow. Second operand 16 states and 1822 transitions. [2022-07-21 08:45:20,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 328 transitions, 2261 flow [2022-07-21 08:45:20,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 328 transitions, 2254 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:45:20,895 INFO L242 Difference]: Finished difference. Result has 193 places, 226 transitions, 1660 flow [2022-07-21 08:45:20,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1660, PETRI_PLACES=193, PETRI_TRANSITIONS=226} [2022-07-21 08:45:20,897 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 54 predicate places. [2022-07-21 08:45:20,897 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 226 transitions, 1660 flow [2022-07-21 08:45:20,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,898 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:20,898 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:20,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:45:20,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2063122850, now seen corresponding path program 2 times [2022-07-21 08:45:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340532053] [2022-07-21 08:45:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340532053] [2022-07-21 08:45:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340532053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:20,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:20,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17866827] [2022-07-21 08:45:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:20,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:20,990 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:20,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 226 transitions, 1660 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:20,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:20,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:24,554 INFO L129 PetriNetUnfolder]: 5984/25944 cut-off events. [2022-07-21 08:45:24,554 INFO L130 PetriNetUnfolder]: For 70769/72006 co-relation queries the response was YES. [2022-07-21 08:45:24,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71557 conditions, 25944 events. 5984/25944 cut-off events. For 70769/72006 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 379541 event pairs, 519 based on Foata normal form. 501/25729 useless extension candidates. Maximal degree in co-relation 71405. Up to 3854 conditions per place. [2022-07-21 08:45:25,070 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 170 selfloop transitions, 169 changer transitions 0/447 dead transitions. [2022-07-21 08:45:25,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 447 transitions, 4145 flow [2022-07-21 08:45:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:45:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:45:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2071 transitions. [2022-07-21 08:45:25,074 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459967320261438 [2022-07-21 08:45:25,074 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2071 transitions. [2022-07-21 08:45:25,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2071 transitions. [2022-07-21 08:45:25,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:25,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2071 transitions. [2022-07-21 08:45:25,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.05555555555556) internal successors, (2071), 18 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:25,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:25,084 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:25,085 INFO L186 Difference]: Start difference. First operand has 193 places, 226 transitions, 1660 flow. Second operand 18 states and 2071 transitions. [2022-07-21 08:45:25,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 447 transitions, 4145 flow [2022-07-21 08:45:25,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 447 transitions, 3976 flow, removed 46 selfloop flow, removed 5 redundant places. [2022-07-21 08:45:25,474 INFO L242 Difference]: Finished difference. Result has 215 places, 325 transitions, 3201 flow [2022-07-21 08:45:25,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3201, PETRI_PLACES=215, PETRI_TRANSITIONS=325} [2022-07-21 08:45:25,475 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 76 predicate places. [2022-07-21 08:45:25,475 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 325 transitions, 3201 flow [2022-07-21 08:45:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:25,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:25,479 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:25,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:45:25,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -328496307, now seen corresponding path program 1 times [2022-07-21 08:45:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:25,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559598150] [2022-07-21 08:45:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559598150] [2022-07-21 08:45:25,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559598150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:25,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:25,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860776249] [2022-07-21 08:45:25,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:25,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:25,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:25,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 325 transitions, 3201 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:25,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:25,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:25,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:30,348 INFO L129 PetriNetUnfolder]: 6964/29881 cut-off events. [2022-07-21 08:45:30,348 INFO L130 PetriNetUnfolder]: For 146079/150003 co-relation queries the response was YES. [2022-07-21 08:45:30,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97401 conditions, 29881 events. 6964/29881 cut-off events. For 146079/150003 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 443292 event pairs, 802 based on Foata normal form. 1172/30495 useless extension candidates. Maximal degree in co-relation 89610. Up to 4333 conditions per place. [2022-07-21 08:45:30,985 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 305 selfloop transitions, 186 changer transitions 0/620 dead transitions. [2022-07-21 08:45:30,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 620 transitions, 7724 flow [2022-07-21 08:45:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:45:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 08:45:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1824 transitions. [2022-07-21 08:45:30,989 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8382352941176471 [2022-07-21 08:45:30,989 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1824 transitions. [2022-07-21 08:45:30,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1824 transitions. [2022-07-21 08:45:30,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:30,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1824 transitions. [2022-07-21 08:45:30,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.0) internal successors, (1824), 16 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:30,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:30,996 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:30,996 INFO L186 Difference]: Start difference. First operand has 215 places, 325 transitions, 3201 flow. Second operand 16 states and 1824 transitions. [2022-07-21 08:45:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 620 transitions, 7724 flow [2022-07-21 08:45:32,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 620 transitions, 6358 flow, removed 633 selfloop flow, removed 6 redundant places. [2022-07-21 08:45:32,617 INFO L242 Difference]: Finished difference. Result has 228 places, 394 transitions, 4003 flow [2022-07-21 08:45:32,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4003, PETRI_PLACES=228, PETRI_TRANSITIONS=394} [2022-07-21 08:45:32,618 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 89 predicate places. [2022-07-21 08:45:32,618 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 394 transitions, 4003 flow [2022-07-21 08:45:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:32,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:32,619 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:32,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:45:32,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash -74641143, now seen corresponding path program 2 times [2022-07-21 08:45:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:32,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492090026] [2022-07-21 08:45:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:32,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:32,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492090026] [2022-07-21 08:45:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492090026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:32,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:32,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141972666] [2022-07-21 08:45:32,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:32,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:32,672 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-21 08:45:32,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 394 transitions, 4003 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:32,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:32,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-21 08:45:32,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:38,452 INFO L129 PetriNetUnfolder]: 7747/35020 cut-off events. [2022-07-21 08:45:38,452 INFO L130 PetriNetUnfolder]: For 149678/152401 co-relation queries the response was YES. [2022-07-21 08:45:38,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107628 conditions, 35020 events. 7747/35020 cut-off events. For 149678/152401 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 542418 event pairs, 694 based on Foata normal form. 951/35176 useless extension candidates. Maximal degree in co-relation 107440. Up to 4122 conditions per place. [2022-07-21 08:45:39,088 INFO L132 encePairwiseOnDemand]: 122/136 looper letters, 213 selfloop transitions, 408 changer transitions 0/750 dead transitions. [2022-07-21 08:45:39,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 750 transitions, 8905 flow [2022-07-21 08:45:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:45:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:45:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2073 transitions. [2022-07-21 08:45:39,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8468137254901961 [2022-07-21 08:45:39,091 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2073 transitions. [2022-07-21 08:45:39,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2073 transitions. [2022-07-21 08:45:39,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:39,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2073 transitions. [2022-07-21 08:45:39,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.16666666666667) internal successors, (2073), 18 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:39,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:39,096 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:39,096 INFO L186 Difference]: Start difference. First operand has 228 places, 394 transitions, 4003 flow. Second operand 18 states and 2073 transitions. [2022-07-21 08:45:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 750 transitions, 8905 flow [2022-07-21 08:45:40,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 750 transitions, 8476 flow, removed 176 selfloop flow, removed 5 redundant places. [2022-07-21 08:45:40,767 INFO L242 Difference]: Finished difference. Result has 249 places, 595 transitions, 7425 flow [2022-07-21 08:45:40,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7425, PETRI_PLACES=249, PETRI_TRANSITIONS=595} [2022-07-21 08:45:40,768 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 110 predicate places. [2022-07-21 08:45:40,768 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 595 transitions, 7425 flow [2022-07-21 08:45:40,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:40,768 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:40,769 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:40,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:45:40,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:45:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -887361412, now seen corresponding path program 1 times [2022-07-21 08:45:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:40,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236991702] [2022-07-21 08:45:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:40,790 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:40,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:40,801 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:40,801 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:45:40,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:45:40,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:45:40,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:45:40,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:45:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:45:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:45:40,802 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-07-21 08:45:40,802 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:40,802 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:45:40,824 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:40,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 361 flow [2022-07-21 08:45:40,841 INFO L129 PetriNetUnfolder]: 12/238 cut-off events. [2022-07-21 08:45:40,841 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:45:40,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 238 events. 12/238 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 530 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 212. Up to 12 conditions per place. [2022-07-21 08:45:40,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 158 transitions, 361 flow [2022-07-21 08:45:40,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 158 transitions, 361 flow [2022-07-21 08:45:40,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:40,846 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319cc25c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f7d022a [2022-07-21 08:45:40,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:45:40,848 INFO L129 PetriNetUnfolder]: 3/71 cut-off events. [2022-07-21 08:45:40,848 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:45:40,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:40,848 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:40,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2054879489, now seen corresponding path program 1 times [2022-07-21 08:45:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:40,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810337429] [2022-07-21 08:45:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810337429] [2022-07-21 08:45:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810337429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:40,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:40,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636334411] [2022-07-21 08:45:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:40,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-07-21 08:45:40,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 158 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:40,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:40,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-07-21 08:45:40,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:43,176 INFO L129 PetriNetUnfolder]: 9956/22593 cut-off events. [2022-07-21 08:45:43,176 INFO L130 PetriNetUnfolder]: For 11866/11866 co-relation queries the response was YES. [2022-07-21 08:45:43,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41240 conditions, 22593 events. 9956/22593 cut-off events. For 11866/11866 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 232258 event pairs, 909 based on Foata normal form. 7110/29116 useless extension candidates. Maximal degree in co-relation 24585. Up to 4734 conditions per place. [2022-07-21 08:45:43,361 INFO L132 encePairwiseOnDemand]: 135/158 looper letters, 115 selfloop transitions, 24 changer transitions 1/258 dead transitions. [2022-07-21 08:45:43,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 258 transitions, 1048 flow [2022-07-21 08:45:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1369 transitions. [2022-07-21 08:45:43,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8664556962025316 [2022-07-21 08:45:43,363 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1369 transitions. [2022-07-21 08:45:43,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1369 transitions. [2022-07-21 08:45:43,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:43,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1369 transitions. [2022-07-21 08:45:43,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:43,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:43,367 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:43,367 INFO L186 Difference]: Start difference. First operand has 162 places, 158 transitions, 361 flow. Second operand 10 states and 1369 transitions. [2022-07-21 08:45:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 258 transitions, 1048 flow [2022-07-21 08:45:43,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 258 transitions, 944 flow, removed 52 selfloop flow, removed 0 redundant places. [2022-07-21 08:45:43,373 INFO L242 Difference]: Finished difference. Result has 172 places, 167 transitions, 493 flow [2022-07-21 08:45:43,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=493, PETRI_PLACES=172, PETRI_TRANSITIONS=167} [2022-07-21 08:45:43,374 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 10 predicate places. [2022-07-21 08:45:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 167 transitions, 493 flow [2022-07-21 08:45:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:43,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:43,375 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:45:43,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash 989074183, now seen corresponding path program 1 times [2022-07-21 08:45:43,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961383152] [2022-07-21 08:45:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:43,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961383152] [2022-07-21 08:45:43,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961383152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:43,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:43,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629873028] [2022-07-21 08:45:43,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:43,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:43,411 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-07-21 08:45:43,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 167 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:43,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:43,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-07-21 08:45:43,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:47,290 INFO L129 PetriNetUnfolder]: 14628/36981 cut-off events. [2022-07-21 08:45:47,290 INFO L130 PetriNetUnfolder]: For 27931/28545 co-relation queries the response was YES. [2022-07-21 08:45:47,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84532 conditions, 36981 events. 14628/36981 cut-off events. For 27931/28545 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 445797 event pairs, 1987 based on Foata normal form. 416/36603 useless extension candidates. Maximal degree in co-relation 71592. Up to 7343 conditions per place. [2022-07-21 08:45:47,749 INFO L132 encePairwiseOnDemand]: 142/158 looper letters, 113 selfloop transitions, 44 changer transitions 0/278 dead transitions. [2022-07-21 08:45:47,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 278 transitions, 1348 flow [2022-07-21 08:45:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1329 transitions. [2022-07-21 08:45:47,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8411392405063292 [2022-07-21 08:45:47,751 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1329 transitions. [2022-07-21 08:45:47,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1329 transitions. [2022-07-21 08:45:47,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:47,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1329 transitions. [2022-07-21 08:45:47,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.9) internal successors, (1329), 10 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:47,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:47,754 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:47,754 INFO L186 Difference]: Start difference. First operand has 172 places, 167 transitions, 493 flow. Second operand 10 states and 1329 transitions. [2022-07-21 08:45:47,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 278 transitions, 1348 flow [2022-07-21 08:45:47,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 278 transitions, 1346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:47,877 INFO L242 Difference]: Finished difference. Result has 183 places, 191 transitions, 767 flow [2022-07-21 08:45:47,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=767, PETRI_PLACES=183, PETRI_TRANSITIONS=191} [2022-07-21 08:45:47,878 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 21 predicate places. [2022-07-21 08:45:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 191 transitions, 767 flow [2022-07-21 08:45:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:47,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:47,879 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:47,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:45:47,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1900820306, now seen corresponding path program 1 times [2022-07-21 08:45:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023337793] [2022-07-21 08:45:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:45:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023337793] [2022-07-21 08:45:47,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023337793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:47,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:47,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:45:47,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906478899] [2022-07-21 08:45:47,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:47,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:45:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:45:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:45:47,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-07-21 08:45:47,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 191 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:47,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:47,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-07-21 08:45:47,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:54,082 INFO L129 PetriNetUnfolder]: 20631/54590 cut-off events. [2022-07-21 08:45:54,082 INFO L130 PetriNetUnfolder]: For 55370/56313 co-relation queries the response was YES. [2022-07-21 08:45:54,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130042 conditions, 54590 events. 20631/54590 cut-off events. For 55370/56313 co-relation queries the response was YES. Maximal size of possible extension queue 2547. Compared 723700 event pairs, 3966 based on Foata normal form. 531/53251 useless extension candidates. Maximal degree in co-relation 129909. Up to 10967 conditions per place. [2022-07-21 08:45:55,195 INFO L132 encePairwiseOnDemand]: 142/158 looper letters, 108 selfloop transitions, 92 changer transitions 0/324 dead transitions. [2022-07-21 08:45:55,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 324 transitions, 2007 flow [2022-07-21 08:45:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:45:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:45:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1324 transitions. [2022-07-21 08:45:55,196 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8379746835443038 [2022-07-21 08:45:55,197 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1324 transitions. [2022-07-21 08:45:55,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1324 transitions. [2022-07-21 08:45:55,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:55,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1324 transitions. [2022-07-21 08:45:55,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:55,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:55,200 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:55,200 INFO L186 Difference]: Start difference. First operand has 183 places, 191 transitions, 767 flow. Second operand 10 states and 1324 transitions. [2022-07-21 08:45:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 324 transitions, 2007 flow [2022-07-21 08:45:55,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 324 transitions, 1999 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:45:55,462 INFO L242 Difference]: Finished difference. Result has 194 places, 243 transitions, 1523 flow [2022-07-21 08:45:55,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1523, PETRI_PLACES=194, PETRI_TRANSITIONS=243} [2022-07-21 08:45:55,463 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 32 predicate places. [2022-07-21 08:45:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 243 transitions, 1523 flow [2022-07-21 08:45:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:55,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:55,463 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:55,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:45:55,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:45:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash 186355362, now seen corresponding path program 1 times [2022-07-21 08:45:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:55,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178370560] [2022-07-21 08:45:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:45:55,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:55,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178370560] [2022-07-21 08:45:55,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178370560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:55,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:55,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282738325] [2022-07-21 08:45:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:55,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-07-21 08:45:55,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 243 transitions, 1523 flow. Second operand has 9 states, 9 states have (on average 120.44444444444444) internal successors, (1084), 9 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:55,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:55,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-07-21 08:45:55,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand